From the Kentucky Campaign to Tullahoma, Chickamauga to Missionary Ridge, junior officer Joshua K. Callaway took part in some of the most critical campaigns of the Civil War. His twice-weekly letters home, written between April 1862 and November 1863, chronicle his gradual change from an ardent Confederate soldier to a weary veteran who longs to be at home.

Callaway was a schoolteacher, husband, and father of two when he enlisted in the 28th Alabama Infantry Regiment at the age of twenty-seven. Serving with the Army of the Tennessee, he campaigned in Mississippi, Kentucky, Tennessee, and...